A double-sided PET hardening film strength detection device

Abstract

The present invention relates to the technical field of hard film detection, and particularly relates to a double-sided PET hard film strength detection device; it includes a bottom plate; two support plates are symmetrically arranged on the left and right at the upper end of the bottom plate, and a detection mechanism located between the two support plates is arranged on the bottom plate; the detection mechanism set in the present invention covers two basic shape friction methods of arc surface and plane, and for each shape, two states of with support and without support are respectively considered, so that more friction scenarios in actual use can be simulated, the wear resistance of the hard film under different working conditions can be ensured to be evaluated, and thus the applicability and accuracy of the test can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hardened film detection, and particularly relates to a double-sided PET hardened film strength detection device. Background Art

[0002] The double-sided PET hardened film is a polyester film that has been specially treated. It is obtained by coating a special material on both sides of a flexible substrate to increase its surface hardness and wear resistance. While maintaining good protective performance, the double-sided PET hardened film can also adapt to a certain degree of bending deformation; this hardened film is commonly used to protect the screens of electronic devices, such as touch screen protection, optical lenses, foldable screens, etc., to prevent them from being scratched or damaged during daily use; and after the double-sided PET hardened film is manufactured, it needs to be subjected to wear strength detection, and the wear strength detection of the double-sided PET hardened film is an important step in evaluating the surface treatment quality and durability.

[0003] Wear strength detection generally aims to determine whether the surface of the hardened film can withstand friction and wear during daily use without losing transparency and without generating scratches or damage. When detecting the wear resistance of the existing hardened film, the hardened film is placed on a platform and then the friction block reciprocates to rub the hardened film, and then it is checked whether the hardened film loses transparency or has obvious scratches and damage.

[0004] In the current process of detecting the wear strength of the hardened film, the following problems exist: the positions where the hardened film is applied are different, it may be used in a horizontal position or in a position with a curvature, and the situations such as whether there is support at the used position are not exactly the same. Only placing the hardened film on the platform for friction detection in a specific way cannot comprehensively reflect the wear resistance of the hardened film in different usage scenarios, resulting in the test results lacking sufficient reference value in actual applications. Summary of the Invention

[0005] In view of the above problems, the embodiments of the present application provide a double-sided PET hardened film strength detection device to solve the above-mentioned technical problems.

[0006] To achieve the above object, the embodiments of the present application provide the following technical solutions: The embodiments of the present application provide a double-sided PET hardened film strength detection device, including a bottom plate; two support plates are symmetrically arranged on the left and right of the upper end of the bottom plate, and a detection mechanism located between the two support plates is arranged on the bottom plate.

[0007] The detection mechanism includes a fixing plate. The fixing plate is installed at the upper end of the bottom plate and has an inverted U-shaped structure. Sliding plates are evenly installed on the upper end of the fixing plate from front to back. A base is rotatably installed on the upper end of the sliding plate through a roller shaft. The rear end face of the base is an arc surface, and a friction block is arranged at the rear side of the base, and the friction block has a D-shaped structure.

[0008] As a preferred solution, a fixing mechanism corresponding to the base one by one is arranged on the support plate.

[0009] As a preferred solution, a swinging part for driving the friction block to rotate reciprocally for friction detection is arranged on the bottom plate, a conversion part for adjusting the horizontal plane and the arc surface of the friction block to be in contact with the hardened film for friction in sequence is arranged on the swinging part, a guiding part is arranged on the bottom plate, and a limiting part for restricting the rotation of the base and adjusting the positions of the arc surface and the horizontal plane of the base is arranged on the sliding plate.

[0010] As a preferred solution, the swinging part includes a shaft column. Shaft columns are installed in the middle of the lower ends of the friction blocks. Rotating shafts corresponding to the bases one by one are rotatably installed at the upper ends of the fixing plates, and the rotating shafts are concentric with the arc surfaces of the corresponding bases. A square cylinder located above the fixing plate is rotatably installed on the rotating shaft. A sliding rod is slidably installed in the square cylinder. The front end of the sliding rod slidably penetrates through the corresponding square cylinder and then is rotatably connected to the corresponding shaft column. An actuator for driving the rotating shaft to rotate is arranged on the fixing plate.

[0011] As a preferred solution, the actuator includes a spur gear. The spur gear is installed at the lower end of the rotating shaft after the rotating shaft rotatably penetrates through the fixing plate. Rack bars corresponding to the spur gears one by one are slidably installed at the lower ends of the horizontal sections of the fixing plates, and the rack bars are meshed with the corresponding spur gears. A connecting plate is installed between two adjacent rack bars. A slider is installed at the front end of the rack bar located at the forefront. A pushing and pulling assembly for reciprocally pushing and pulling the slider is arranged on the fixing plate.

[0012] As a preferred solution, the pushing and pulling assembly includes a stepper motor. The stepper motor is installed at the upper end of the fixing plate. The output shaft of the stepper motor rotatably penetrates through the fixing plate and then a cam is installed. A connecting rod is hinged between the cam and the slider.

[0013] As a preferred solution, the conversion part includes a limiting plate. Limiting plates are fixedly installed on the shaft columns above the corresponding square cylinders. Two first limiting columns are slidably installed on the limiting plates. A first connecting plate is jointly installed at the upper ends of the two first limiting columns on the same limiting plate. A first tension spring is arranged between the first connecting plate and the corresponding limiting plate. First limiting holes for cooperating with the corresponding two first limiting columns are formed in the square cylinder and the sliding rod.

[0014] As a preferred solution, the limiting part includes second limiting columns. Two second limiting columns are symmetrically arranged at the left and right sides of the upper end of the base. A second connecting plate is jointly installed at the upper ends of the two limiting columns on the same base. A second tension spring is installed between the second connecting plate and the corresponding base. Second limiting holes corresponding to the corresponding second limiting columns one by one are formed in the sliding plate. The upper ends of the second limiting columns slidably penetrate through the corresponding bases and then cooperate with the corresponding second limiting holes. A driving assembly for driving the sliding plate to move is arranged on the fixing plate.

[0015] As a preferred solution, the guiding part includes a guiding groove, and a guiding groove corresponding to the first limiting posts one by one and located in front of the corresponding friction blocks is formed at the upper end of the fixing plate.

[0016] As a preferred solution, the fixing mechanism includes T-shaped columns. Two T-shaped columns that are symmetrically arranged up and down are provided on the opposite surfaces of the two support plates. A compression spring is installed between the vertical section of the T-shaped column and the corresponding support plate. The horizontal sections of the two T-shaped columns that are symmetrically arranged up and down slide through the corresponding support plates and are jointly installed with a support plate. The support plate has an inverted L-shaped structure, and a clamping part for clamping and fixing the end of the hardening film is provided on the support plate.

[0017] As a preferred solution, the clamping part includes a supporting plate. The supporting plate is fixedly installed on the side of the longitudinal section of the support plate away from the corresponding support plate. A cylinder is installed at the rear end of the support plate. The telescopic section of the cylinder slides through the transverse section of the corresponding support plate and is installed with a pressing plate located behind the corresponding supporting plate, and the pressing plate is slidably connected to the corresponding support plate.

[0018] As a preferred solution, the driving component includes a shaft seat. The left end of the left vertical section of the fixing plate is rotatably installed with a lead screw through the shaft seat, and the lead screw is threadedly connected to the sliding plate.

[0019] One or more of the above technical solutions in the embodiments of the present invention have at least one of the following technical effects: First, the detection mechanism provided in the present invention covers two basic friction methods of arc surface and plane, and for each shape, two states of with support and without support are respectively considered, so that more actual friction scenarios in use can be simulated, and the wear resistance of the hardening film under different working conditions can be ensured to be evaluated, thereby improving the applicability and accuracy of the test.

[0020] Second, the conversion part provided in the present invention restricts the sliding of the sliding rod in the square tube through the cooperation of the first limiting post and the first limiting hole, so that the square tube rotates, and the friction block rotates while keeping perpendicular to the sliding rod in its horizontal plane, so as to friction the hardening film through its arc surface. The rotating limiting plate drives the friction block to rotate, so that its horizontal plane fits the hardening film. At this time, the first limiting post cooperates with the guiding groove, so that the sliding rod can slide in the square tube when the square tube rotates, and then pushes the friction block to keep horizontal reciprocating movement, so as to friction the hardening film through the horizontal plane of the friction block.

[0021] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0023] Figure 1 It is a schematic structural diagram when the present application detects the hardened film.

[0024] Figure 2 It is a schematic structural diagram of the clamping part of the present application.

[0025] Figure 3 is Figure 2 the enlarged structural view of part A in

[0026] Figure 4 It is a schematic structural diagram of the limiting part of the present application.

[0027] Figure 5 It is a schematic structural diagram of the conversion part of the present application.

[0028] Figure 6 It is a schematic structural diagram of the actuator of the present application.

[0029] Reference numerals: 10, base plate; 11, support plate; 2, detection mechanism; 20, fixing plate; 21, sliding plate; 22, roller shaft; 23, base; 24, friction block; 25, swinging part; 250, shaft column; 251, rotating shaft; 252, square tube; 253, sliding rod; 4, actuator; 40, spur gear; 41, rack; 42, connecting plate; 43, slider; 44, stepper motor; 45, cam; 46, connecting rod; 26, conversion part; 260, limiting plate; 261, first limiting column; 262, first connecting plate; 263, first tension spring; 27, guiding part; 270, guiding groove; 28, limiting part; 280, second limiting column; 281, second connecting plate; 282, second tension spring; 283, lead screw; 3, fixing mechanism; 30, T-shaped column; 31, compression spring; 32, support plate; 33, clamping part; 330, support plate; 331, cylinder; 332, pressing plate. Detailed Description of the Invention

[0030] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific embodiments of the present invention with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0031] As shown Figure 1 in the figure, a double-sided PET hardening film strength detection device includes a bottom plate 10; two support plates 11 are symmetrically arranged on the left and right at the upper end of the bottom plate 10, and a detection mechanism 2 is arranged on the bottom plate 10 between the two support plates 11.

[0032] As shown Figure 1 , Figure 2 , Figure 4 and Figure 5 in the figure, the detection mechanism 2 includes a fixing plate 20. The fixing plate 20 is installed at the upper end of the bottom plate 10, and the fixing plate 20 is in an inverted U-shaped structure. A sliding plate 21 is uniformly installed on the upper end of the fixing plate 20 from front to back. A base 23 is rotatably installed on the upper end of the sliding plate 21 through a roller 22. The rear end surface of the base 23 is an arc surface. A friction block 24 is arranged at the rear side of the base 23, and the friction block 24 is in a D-shaped structure.

[0033] As shown Figure 1 in the figure, a fixing mechanism 3 corresponding to the base 23 is arranged on the support plate 11.

[0034] As shown Figure 1 and Figure 2 in the figure, a swinging part 25 for driving the friction block 24 to reciprocally rotate for friction detection is arranged on the bottom plate 10. A conversion part 26 for adjusting the horizontal plane and the arc surface of the friction block 24 to be in contact with the hardening film in sequence for friction is arranged on the swinging part 25. A guiding part 27 is arranged on the bottom plate 10. A limiting part 28 for restricting the rotation of the base 23 and adjusting the positions of the arc surface and the horizontal plane of the base 23 is arranged on the sliding plate 21.

[0035] During specific operation, the hardening film is manually placed between two fixing mechanisms 3 that are opposite to each other left and right, and the hardening film is fixed by the fixing mechanism 3. Then, the conversion part 26 adjusts the arc surface or the horizontal plane of the friction block 24 to be close to the hardening film, and the limiting part 28 adjusts the horizontal plane and the arc surface positions of the base 23 according to the positions of the horizontal plane and the arc surface of the friction block 24. After that, the swinging part 25 drives the friction block 24 to reciprocally rotate to perform friction on the hardening film, and observe whether the hardening film loses transparency, has scratches and damages after friction.

[0036] As shown Figure 1 and Figure 2 in the figure, the fixing mechanism 3 includes a T-shaped column 30. Two T-shaped columns 30 that are symmetrically arranged up and down are arranged on the opposite surfaces of the two support plates 11. A compression spring 31 is installed between the vertical section of the T-shaped column 30 and the corresponding support plate 11. The horizontal sections of the two T-shaped columns 30 that are symmetrically arranged up and down slide through the corresponding support plates 11 and are jointly installed with a support plate 32. The support plate 32 is in an inverted L-shaped structure, and a clamping part 33 for clamping and fixing the end of the hardening film is arranged on the support plate 32.

[0037] As Figure 1 and Figure 2 shown, the clamping part 33 includes a supporting plate 330. A supporting plate 330 is fixedly installed on the side of the longitudinal section of the supporting plate 32 away from the corresponding supporting plate 11. A cylinder 331 is installed at the rear end of the supporting plate 32. The telescopic section of the cylinder 331 slidably penetrates through the transverse section of the corresponding supporting plate 32 and then a pressing plate 332 located behind the corresponding supporting plate 330 is installed, and the pressing plate 332 is slidably connected to the corresponding supporting plate 32.

[0038] During specific operation, manually place the hardening film between two fixed mechanisms 3 opposite to each other left and right, and place the end of the hardening film between the corresponding pressing plate 332 and supporting plate 330. Then, the cylinder 331 pushes the corresponding pressing plate 332 to move towards the corresponding supporting plate 330 to squeeze and fix the hardening film. After that, the detection mechanism 2 rubs the hardening film. During the rubbing process, the friction block 24 presses against the hardening film. When pressing against the hardening film, it will pull the corresponding T-shaped column 30 and compress the corresponding compression spring 31, preventing the hardening film from being stretched and causing dimensional changes, so that the hardening film can be bent and rubbed in its original size during the pressing process.

[0039] As Figure 1 , Figure 2 , Figure 3 and Figure 5 shown, the swinging part 25 includes a shaft column 250. A shaft column 250 is installed in the middle of the lower end of each friction block 24. A rotating shaft 251 corresponding to the base 23 is rotatably installed at the upper end of the fixing plate 20, and the rotating shaft 251 is concentric with the arc surface of the corresponding base 23. A square tube 252 located above the fixing plate 20 is rotatably installed on the rotating shaft 251. A sliding rod 253 is slidably installed in the square tube 252. The front end of the sliding rod 253 slidably penetrates through the corresponding square tube 252 and then is rotatably connected to the corresponding shaft column 250. An actuator 4 for driving the rotation of the rotating shaft 251 is provided on the fixing plate 20.

[0040] As Figure 2 , Figure 3 and Figure 5 shown, the conversion part 26 includes a limiting plate 260. A limiting plate 260 located above the corresponding square tube 252 is fixedly installed on the shaft column 250. Two first limiting columns 261 are slidably installed on the limiting plate 260. The upper ends of the two first limiting columns 261 on the same limiting plate 260 are jointly installed with a first connecting plate 262. A first tension spring 263 is arranged between the first connecting plate 262 and the corresponding limiting plate 260. First limiting holes cooperating with the corresponding two first limiting columns 261 are formed on the square tube 252 and the sliding rod 253.

[0041] As Figure 1 , Figure 4 andFigure 5 As shown, the guiding portion 27 includes a guiding groove 270, and a guiding groove 270 corresponding to the first limiting posts 261 one by one and located in front of the corresponding friction blocks 24 is formed at the upper end of the fixing plate 20.

[0042] As Figure 2 , Figure 4 and Figure 5 As shown, the limiting portion 28 includes second limiting posts 280. Two second limiting posts 280 are symmetrically arranged on the left and right at the upper end of the base 23. A second connecting plate 281 is commonly installed at the upper ends of the two limiting posts on the same base 23. A second tension spring 282 is installed between the second connecting plate 281 and the corresponding base 23. Second limiting holes corresponding to the corresponding second limiting posts 280 one by one are formed on the sliding plate 21. The lower ends of the second limiting posts 280 slide through the corresponding bases 23 and then cooperate with the corresponding second limiting holes. A driving assembly for driving the sliding plate 21 to move is arranged on the fixing plate 20.

[0043] As Figure 2 and Figure 4 As shown, the driving assembly includes a shaft seat. A lead screw 283 is rotatably installed at the left end of the left vertical section of the fixing plate 20 through the shaft seat. The lead screw 283 is in threaded connection with the sliding plate 21.

[0044] During specific operation, the swinging portion 25 drives the square tube 252 to rotate. The square tube 252 drives the friction block 24 to reciprocally rotate through the sliding rod 253. Since the first limiting post 261 is inserted into the first limiting hole, the sliding of the sliding rod 253 in the square tube 252 is restricted. Thus, the friction block 24 can perform arc-shaped rotation along with the sliding rod 253 to push and bend the hard film and press it against the arc surface of the base 23. The arc surface of the friction block 24 then frictions the hard film under the support and resistance of the base 23. After frictional operation for a certain period of time, an external motor installed on the fixing plate 20 operates to drive the lead screw 283 to rotate. The lead screw 283 drives the sliding plate 21 to move forward. The sliding plate 21 drives the corresponding base 23 to move away from the corresponding hard film, so that the base 23 no longer supports and resists the hard film. Then, the swinging portion 25 drives the friction block 24 to reciprocally rotate again, so that the friction block 24 presses and frictions the hard film without the support and resistance of the base 23.

[0045] After the arc surface of the friction block 24 frictions the hardening film, the first connecting plate 262 is pulled upward. The first connecting plate 262 drives the first limiting post 261 to disengage from the limiting hole, and at the same time stretches the first tension spring 263. Then the limiting plate 260 is rotated 180 degrees, so that the first limiting post 261 moves to the corresponding guiding groove 270 position. After that, the first connecting plate 262 is released, and the first connecting plate 262 is pulled by the first tension spring 263 to move towards the bottom plate 10, so that the first limiting post 261 is inserted into the corresponding guiding groove 270. At the same time, the friction block 24 will rotate with the rotation of the limiting plate 260, making its horizontal plane contact with the hardening film. Then the second connecting plate 281 is pulled upward, the second connecting plate 281 drives the second limiting post 280 to disengage from the second limiting hole. After that, the base 23 is rotated 180 degrees, so that the horizontal plane of the base 23 faces the corresponding hardening film. The external motor drives the lead screw 283 to rotate in the reverse direction, so that the base 23 moves towards the corresponding hardening film until the horizontal plane of the base 23 fits the hardening film. Then the square tube 252 and the sliding rod 253 rotate. Since the sliding rod 253 is not blocked by the first limiting post 261, it can slide in the square tube 252. At the same time, the first limiting post 261 slides in the corresponding guiding groove 270 to limit the rotation of the friction block 24. Thus, with the rotation of the square tube 252 and the sliding rod 253, and the sliding of the sliding rod 253 in the square tube 252, the friction block 24 is pushed to move left and right reciprocally, and under the support of the base 23, it performs planar supported friction on the hardening film. After that, the external motor drives the base 23 to move away from the corresponding hardening film through the lead screw 283. Then the friction block 24 performs planar unsupported friction testing on the hardening film. After each friction method is detected, it is necessary to observe whether the hardening film loses transparency and whether there are problems such as scratches and damages.

[0046] As Figure 1 and Figure 6 shown, the actuator 4 includes a spur gear 40. The lower end of the rotating shaft 251 rotates through the fixed plate 20 and is installed with a spur gear 40. The lower end of the horizontal section of the fixed plate 20 is slidably installed with a rack 41 corresponding to the spur gear 40 one by one, and the rack 41 meshes with the corresponding spur gear 40. A connecting plate 42 is installed between adjacent two racks 41. The front end of the rack 41 at the frontmost position is installed with a slider 43. The fixed plate 20 is provided with a pushing and pulling assembly for reciprocally pushing and pulling the slider 43.

[0047] As Figure 1 、 Figure 2 and Figure 6 shown, the pushing and pulling assembly includes a stepper motor 44. The stepper motor 44 is installed at the upper end of the fixed plate 20. The output shaft of the stepper motor 44 rotates through the fixed plate 20 and is installed with a cam 45. A connecting rod 46 is hinged between the cam 45 and the slider 43.

[0048] During specific operation, the stepping motor 44 drives the cam 45 to rotate. The cam 45 reciprocally pushes and pulls the slider 43 through the connecting rod 46. During the reciprocating movement of the slider 43, the corresponding rack 41 will be driven to move. The remaining racks 41 move synchronously through the connecting plate 42. During the movement of the rack 41, the spur gear 40 is driven to rotate reciprocally. The spur gear 40 drives the rotating shaft 251 to rotate reciprocally. The rotating shaft 251 drives the corresponding friction block 24 to reciprocally move through the square tube 252, the slide bar 253 and the shaft post 250, so as to perform friction detection on the hardened film.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0050] In addition, the terms "first", "second", "No. 1", "No. 2" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "No. 1", "No. 2" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0051] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0052] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A double-sided PET hardened film strength testing device, comprising a bottom plate; characterized in that: Two support plates are symmetrically arranged at the upper end of the bottom plate, and a detection mechanism is arranged on the bottom plate and located between the two support plates; wherein: The detection mechanism comprises a fixed plate, the upper end of the bottom plate is provided with a fixed plate, and the fixed plate is in an inverted D-shaped structure, the upper end of the fixed plate is provided with a slide plate which is evenly slidably installed from front to back, the upper end of the slide plate is provided with a base which is rotatably installed through a roller shaft, the rear end surface of the base is an arc surface, and a friction block is provided on the rear side of the base, and the friction block is in a D-shaped structure; The support plate is provided with a fixing mechanism corresponding to the base one by one; The bottom plate is provided with a swinging part for driving the friction block to reciprocate for friction detection, the swinging part is provided with a conversion part for adjusting the horizontal surface and the arc surface of the friction block to sequentially fit the friction with the hardened film, the bottom plate is provided with a guide part, and the slide plate is provided with a limit part for limiting the rotation of the base and adjusting the position of the arc surface and the horizontal surface of the base; The swinging part includes a shaft column, and the middle part of the lower end of the friction block is equipped with a shaft column, and the upper end of the fixed plate is rotatably equipped with a rotating shaft corresponding to the base one by one, and the rotating shaft is concentric with the arc surface of the corresponding base, and a square tube located above the fixed plate is rotatably installed on the rotating shaft, and a sliding rod is slidably installed in the square tube, and the front end of the sliding rod slides through the corresponding square tube and is rotatably connected with the corresponding shaft column, and an actuator for driving the rotating shaft to rotate is arranged on the fixed plate; The conversion part includes a limit plate, a limit plate located above the corresponding square tube is fixedly installed on the shaft column, two No. 1 limit columns are slidably installed on the limit plate, a No. 1 connecting plate is commonly installed at the upper ends of the two No. 1 limit columns on the same limit plate, a No. 1 tension spring is arranged between the No. 1 connecting plate and the corresponding limit plate, and a No. 1 limit hole cooperating with the corresponding two No. 1 limit columns is opened on the square tube and the slide rod; The limiting part includes a No. 2 limiting column, two No. 2 limiting columns are symmetrically arranged on the upper end of the base, a No. 2 connecting plate is installed on the upper ends of the two limiting columns on the same base, a No. 2 tension spring is installed between the No. 2 connecting plate and the corresponding base, and a No. 2 limiting hole corresponding to the corresponding No. 2 limiting column is opened on the slide plate, and the upper end of the No. 2 limiting column slides through the corresponding base and then cooperates with the corresponding No. 2 limiting hole, and a driving component for driving the slide plate to move is arranged on the fixed plate; The guide portion comprises a guide groove, and the upper end of the fixing plate is provided with a guide groove which corresponds one-to-one with the first limiting column and is located at the front side of the corresponding friction block.

2. A double-sided PET hardened film strength testing device according to claim 1, characterized in that: The actuator includes a spur gear, and the lower end of the rotating shaft is installed with a spur gear after rotating through the fixed plate. A rack corresponding to the spur gear is slidably installed at the lower end of the horizontal section of the fixed plate, and the rack is meshed with the corresponding spur gear. A connecting plate is installed between two adjacent racks, and a slider is installed at the front end of the rack located at the front, and a push-pull assembly for reciprocatingly pushing and pulling the slider is provided on the fixed plate.

3. A double-sided PET hardened film strength testing device according to claim 2, characterized in that: The push-pull assembly comprises a stepper motor, and the upper end of the fixed plate is provided with the stepper motor. The output shaft of the stepper motor rotates and passes through the fixed plate, and a cam is provided thereafter. A connecting rod is hinged between the cam and the slider.

4. A double-sided PET hardened film strength testing device according to claim 1, characterized in that: The fixing mechanism includes a T-shaped column. Two T-shaped columns symmetrically arranged on the back sides of the two support plates, a compression spring is installed between the vertical section of the T-shaped column and the corresponding support plate, and the horizontal sections of the two symmetrical T-shaped columns slide through the corresponding support plates and are jointly installed with a support plate. The support plate is an inverted L-shaped structure, and a clamping portion for clamping and fixing the end of the hardened film is arranged on the support plate.

5. A double-sided PET hardened film strength testing device according to claim 4, characterized in that: The clamping part includes a support plate, a support plate is fixedly installed on the side of the longitudinal section of the support plate away from the corresponding support plate, a cylinder is installed at the rear end of the support plate, and a pressure plate located on the rear side of the corresponding support plate is installed after the telescopic section of the cylinder slides through the transverse section of the corresponding support plate, and the pressure plate is slidably connected to the corresponding support plate.

6. A double-sided PET hardened film strength testing device according to claim 1, characterized in that: The driving assembly comprises an axle seat, and a screw rod is rotatably mounted on the left end of the left vertical section of the fixed plate through the axle seat, and the screw rod is threadedly connected to the slide plate.

Images